How would an impurity affect the boiling point of a liquid? a. What if the impur

Question

How would an impurity affect the boiling point of a liquid? a. What if the impurity was miscible? b. What if the impurity was immiscible? c. What if the impurity formed an azeotrope?

What errors in observed physical properties might lead to misidentification of a liquid? a. boiling point errors b. index of refraction errors

What observed FTIR resonances are most useful in distinguishing functional groups? a. alcohols b. ketones What aspects of covalent bonds increases the vibrational energy? a. atoms in the bonds b. types of bonds (i.e. single, double, triple)

Why would a fractionating column be more efficient than a simple column at separating compounds that have boiling points that are less than 50 oC apart?

Why would a fractionating column be more efficient than a simple column at separating compounds that have boiling points that are less than 50 oC apart?

Explanation / Answer

1.impurity will alter the increase or decrease the boiling point depending on solubility of the impurity

a. If the impurity is miscible the liquid will boil at a lower temperature I.e. there will be melting point depression

b .immiscible impurities do not have any effect on the boiling point

c. Boiling point will be higher or lower than the pure component due to formation if azeotrope the boiling point will remain constant

2. Boiling point errors

3. Ketone

4.types of bond

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